Production process and production line of 45-degree inclined shearing silicon steel sheet

Abstract

The invention relates to the field of silicon steel sheet production and processing, in particular to a production process and a production line of a 45-degree obliquely-cut silicon steel sheet, and the production process comprises the following steps: S1, uncoiling; s2, straightening is conducted; s3, conveying is conducted; s4, bevel angle cutting is conducted, specifically, two cutters are arranged in the moving direction of the silicon steel belt at the interval of the length of one short side plate, the included angle between the two cutters is 90 degrees, the included angle between each cutter and the sliding direction of the silicon steel belt is 45 degrees, the silicon steel belt stops moving every time when the moving length of the silicon steel belt exceeds the length of one long side plate of the downstream cutter, the two cutters move downwards to cut the silicon steel belt, and the silicon steel belt is cut; a long side plate and a short side plate are formed; s5, notch cutting is conducted, specifically, notches matched with the middle transverse plate are cut in the long side plates formed in the step S4; and S6, discharging and collecting. The long side plate and the short side plate are formed by cutting on the same cutter, so that the matching performance of the oblique angles of the long side plate and the short side plate is higher.

Description

Technical Field

[0001] The present application relates to the field of silicon steel sheet production and processing, and in particular to a production process and production line for 45° oblique shear silicon steel sheets. Background Art

[0002] Silicon steel sheet is a soft magnetic material with high magnetic permeability. It can efficiently conduct magnetic field and form a closed magnetic circuit, ensuring that the magnetic flux lines in the transformer are concentrated through the iron core and reducing magnetic leakage. Therefore, it is widely used in transformers. Figure 1 The silicon steel sheets are cut and spliced ​​into a single-layer iron core layer, which mainly includes two long side plates 71, two short side plates 72 and a middle horizontal plate 73, and are spliced ​​into a "sun"-shaped structure. The long side plates 71, the short side plates 72 and the middle horizontal plate 73 are spliced ​​at a 45° bevel. Therefore, the silicon steel sheets need to be sheared at a 45° bevel.

[0003] In the existing 45° bevel shearing process for silicon steel sheets, the long side plates 71 and the short side plates 72 are cut and manufactured in two production lines, and the cutters on the two production lines bevel the silicon steel strips to produce the corresponding long side plates 71 and short side plates 72, respectively, and then the long side plates 71 and the short side plates 72 are selected for splicing. In the related art, the two production lines may have mechanical calibration deviations and different degrees of tool wear, resulting in differences in bevel angle dimensions, resulting in poor matching of the bevel angles of the long side plates 71 and the short side plates 72. Summary of the invention

[0004] In order to improve the problem that the long side plates and the short side plates are cut and produced in two production lines, resulting in poor matching of the bevel angles of the long side plates and the short side plates, the present application provides a production process and production line for 45° bevel sheared silicon steel sheets.

[0005] On the one hand, the present application provides a production process for 45° oblique shearing of silicon steel sheets using the following technical solution: A production process for 45° oblique shearing of silicon steel sheets comprises the following steps: S1, unwinding, unfolding the rolled silicon steel strip and making it straight; S2, straightening, straightening the silicon steel strip to make it flat; S3, conveying, conveying the corrected silicon steel strip along the front of the assembly line; S4, bevel cutting, two cutters are arranged along the moving direction of the silicon steel strip at an interval of one short side plate length, the angle between the two cutters is 90°, and the angle between each cutter and the sliding direction of the silicon steel strip is 45°. The silicon steel strip stops every time it moves beyond the length of one long side plate of the downstream cutter, and the two cutters move down to cut the silicon steel strip to form a long side plate and a short side plate; S5, notch cutting, cutting a notch on the long side plate formed in step S4 to match the middle horizontal plate; S6, unloading and collection, the cut long side boards and short side boards are transported to the collection area for stacking or boxing.

[0006] By adopting the above technical scheme, when cutting the silicon steel strip, the short side plate is directly cut out by the cutter, and the long side plate is formed at the front section of the short side plate. The long side plate and the short side plate are cut on the same equipment, and the consistency of parameters such as tool angle, pressure, speed, etc. is higher, and the bevel accuracy is ensured to be uniform, the influence of tool wear on the two plates is synchronized, and the cutting errors can offset each other; the long side plate and the short side plate are from the same roll of steel strip, the material thickness, hardness, and internal stress distribution are consistent, and the thermal expansion and contraction effects are synchronized during splicing, so that the bevel angles of the long side plate and the short side plate are more matched.

[0007] Preferably, after the downstream cutter finishes cutting the silicon steel strip, the upstream cutter cuts the silicon steel strip again.

[0008] By adopting the above technical solution, when the cutter cuts the silicon steel strip and the silicon steel strip breaks, lateral displacement will occur. When the downstream cutter cuts the silicon steel strip, the long side plate generated can move forward to release the extrusion pressure of the cutter on the long side plate. The upstream cutter generates a short side plate for the silicon steel strip. At this time, the front section of the short side plate is in a free moving state. When the cutter is cutting, the short side plate can release the extrusion pressure generated by the cutter by moving, thereby effectively avoiding the phenomenon that the cutter squeezes the short side plate and causes bending, thereby improving the cutting quality of the short side plate.

[0009] On the other hand, the present application provides a production line for 45° oblique shearing of silicon steel sheets using the following technical solution: A production line for 45° oblique shearing of silicon steel sheets, using the production process of 45° oblique shearing of silicon steel sheets, comprises a production line body, the production line body is provided with an unfolding unit, a correction unit, an angle cutting unit and a notch cutting unit, the unfolding unit can unfold the silicon steel strip onto the production line body, the correction unit flattens the silicon steel strip, the angle cutting unit can cut the silicon steel strip to form a long side plate and a short side plate, and the notch cutting unit can cut the long side plate to form a notch matching with the middle horizontal plate.

[0010] By adopting the above technical scheme, when cutting the silicon steel strip, the silicon steel strip in the side panel production line is first unfolded by the unfolding unit, then corrected by the correction unit, and then cut into long side panels and short side panels by the bevel cutting unit, and then the long side panels are cut by the notch cutting unit to form a notch, thereby completing the 45° bevel shearing of the long side panels and the short side panels, thereby improving the matching of the long side panels and the short side panels.

[0011] Preferably, the bevel cutting unit includes a pressing mechanism and two groups of cutters. A cutting table for placing the silicon steel strip is provided on the production line body. The two groups of cutters are arranged above the cutting table. The pressing mechanism can press down the two groups of cutters to cut the silicon steel strip to form long side plates, short side plates and 45° bevels on the long side plates and the short side plates.

[0012] By adopting the above technical solution, when the silicon steel strip is cut, the silicon steel strip is moved to the cutting table, and the pressing mechanism drives two sets of cutting knives to press down on the silicon steel strip on the cutting table, and short side plates are produced between the two cutting knives, and long side plates are produced downstream of the cutting knives, completing the one-time cutting of the long side plates and the short side plates.

[0013] Preferably, the production line body is provided with two groups of replacement components above the cutting table, each group of the replacement components corresponds to a group of the cutters, the number of the cutters in each group is several and is evenly arranged on the replacement components, and the replacement components can cyclically drive the cutters to move one by one to the bottom of the pressing mechanism, so that the pressing mechanism presses down the cutters to cut the silicon steel strip.

[0014] By adopting the above technical solution, when the cutter continuously cuts the silicon steel strip, the heat generated by the cutter is not easy to dissipate in time, which will cause the hardness of the tool edge to decrease, and thermal softening and thermal fatigue will occur, resulting in a shortened tool life. For this reason, after the pressing mechanism presses down the cutter to cut the silicon steel strip, when the pressing mechanism is lifted, the replacement component drives another cutter to move to the bottom of the pressing mechanism, so that a single cutter does not need to cut the silicon steel strip continuously. During the cutting cycle, the heat generated by the cutter can be dissipated, effectively avoiding thermal softening and thermal fatigue of the cutter edge, thereby extending the tool life.

[0015] Preferably, the replacement assembly includes a rotating bracket and a tool holder, the rotating bracket is rotatably connected to the production line body and can rotate along a vertical plane, the tool holder corresponds one-to-one to each group of the cutters, the cutters are slidably arranged on the tool holder, the rotating bracket can drive the cutters to move to the bottom of the pressing mechanism, and the pressing mechanism and the rotating bracket are connected by a transmission member so as to drive the rotating bracket to rotate.

[0016] By adopting the above technical solution, when the cutter is circulated, the movement of the pressing mechanism drives the rotating bracket to rotate through the transmission part, so that the next cutter can move to the bottom of the pressing mechanism, and the pressing mechanism then presses the cutter down to slide onto the silicon steel strip for cutting. The transmission part is used to realize the linkage between the pressing mechanism and the cutter replacement, so that the cutting of the silicon steel strip and the replacement of the cutter are better coordinated.

[0017] Preferably, the pressing mechanism comprises a first hydraulic cylinder, the piston rod of the first hydraulic cylinder faces the cutting table; The transmission member includes a driving rod and a telescopic spring, the driving rod is arranged on the piston rod of the first hydraulic cylinder so that the first hydraulic cylinder drives the driving rod to move, the driving rod is slidably connected to the piston rod of the first hydraulic cylinder, a driving groove corresponding to the cutter is opened on the rotating bracket, the telescopic spring is arranged on the piston rod of the first hydraulic cylinder and is connected to the driving rod so as to drive the driving rod to be inserted into the driving groove, the driving rod can slide along the driving groove and drive the rotating bracket to rotate so that the cutter can move to the bottom of the first hydraulic cylinder, and a removal guide surface is provided on the side wall of the driving groove, the driving rod can slide out of the driving groove along the removal guide surface so that the rotating bracket rotates in one direction.

[0018] By adopting the above technical solution, when the piston rod of the first hydraulic cylinder is lifted, the piston rod drives the driving rod to be lifted, and when the driving rod is aligned with the driving groove, the driving rod is inserted into the driving groove under the push of the telescopic spring. At this time, the driving rod drives the rotating bracket to rotate while the piston rod is lifted. When the driving rod drives the rotating bracket to the extreme position, another cutter moves to the bottom of the piston rod of the first hydraulic cylinder; when the cutter cuts the silicon steel strip, the piston rod of the first hydraulic cylinder moves downward, and at this time the driving rod slides out of the driving groove under the guidance of the guide surface, so that the rotating bracket remains stationary, and the piston rod of the first hydraulic cylinder presses the cutter down to the silicon steel strip for cutting, thereby improving the convenience of the first hydraulic cylinder for rotating the rotating bracket.

[0019] Preferably, a guide groove is provided on the tool holder, and the cutter is slidably arranged in the guide groove so that the cutter slides down to cut the silicon steel strip. The cutter is connected to the tool holder by a reset spring, and the reset spring is used to drive the cutter to detach from the silicon steel strip so that the cutter can rotate with the rotating bracket.

[0020] By adopting the above technical solution, the guide groove is used to guide the sliding of the cutter, thereby improving the accuracy and stability of the cutter when sliding; when the piston rod of the first hydraulic cylinder is lifted, the cutter is separated from the silicon steel sheet under the push of the return spring, which facilitates the subsequent rotation and replacement of the cutter.

[0021] Preferably, the production line body includes a main line body, a long side plate line body and a short side plate line body, the long side plate line body and the short side plate line body are both located downstream of the bevel cutting unit, and a material dividing piece is provided at the end of the main line body, and the material dividing piece can distribute the long side plates to the long side plate line body and the short side plates to the short side plate line body, and the notch cutting unit is located on the long side plate line body.

[0022] By adopting the above technical scheme, the silicon steel strip after the initial cutting forms long side plates and short side plates. When passing through the dividing piece, the dividing piece shortens the long side plates and sends them to the long side plate line body, and sends the short side plates to the short side plate line body. The notch cutting unit cuts the long side plates on the long side plate line body to form a notch, separates the short side plates from the long side plates, and facilitates the re-cutting of the long side plates.

[0023] Preferably, a screening opening is formed between the main line body and the long side plate line body, the screening opening is longer than the short side plate and shorter than the long side plate, and the front section of the short side plate line body is located below the screening opening; The material dividing piece includes a first pressing roller arranged on the main line body, the first pressing roller can press down the long side plate to contact with the main line body so that the long side plate slides onto the long side plate line body, and a second pressing roller is arranged on the long side plate line body, the second pressing roller can press down the long side plate to contact with the long side plate line body so that the long side plate is separated from the main line body.

[0024] By adopting the above technical solution, when the long side plates and the short side plates move to the screening port, the short side plates fall from the screening port to the short side plate line body, and the long side plates are moved to the long side plate line body with the assistance of the first pressing roller and the second pressing roller, thereby facilitating the separation of the long side plates and the short side plates.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When cutting the silicon steel strip, the short side plate is directly cut out by the cutter, and the long side plate is formed in the front section of the short side plate. The long side plate and the short side plate are cut on the same equipment, and the consistency of parameters such as tool angle, pressure, speed, etc. is higher, and the bevel accuracy is ensured to be uniform. The influence of tool wear on the two plates is synchronized, and the cutting errors can offset each other; the long side plate and the short side plate are from the same roll of steel strip, and the material thickness, hardness, and internal stress distribution are consistent. The thermal expansion and contraction effects are synchronized during splicing, so that the bevel angles of the long side plate and the short side plate are more matched; 2. After the pressing mechanism has finished cutting the silicon steel strip, the pressing mechanism is lifted, and the replacement component drives another cutter to move to the bottom of the pressing mechanism, so that a single cutter does not need to cut the silicon steel strip continuously. During the cutting cycle, the heat generated by the cutter can be dissipated, effectively avoiding thermal softening and thermal fatigue of the cutter edge, and extending the tool life; 3. The transmission parts are used to realize the linkage between the pressing mechanism and the replacement of the cutter, so that the cutting of the silicon steel strip and the replacement of the cutter are better coordinated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a single-layer iron core.

[0027] Figure 2It is a structural schematic diagram of a production line for 45° oblique shearing of silicon steel sheets according to an embodiment of the present application.

[0028] Figure 3 is a top view of the bevel cutting unit.

[0029] Figure 4 is along Figure 3 Section view along line AA.

[0030] Figure 5 yes Figure 3 Enlarged view of part B in the middle.

[0031] Figure 6 It is a schematic diagram for showing the structure of the rotating bracket.

[0032] Figure 7 yes Figure 2 Enlarged view of part C in the middle.

[0033] Figure 8 yes Figure 2 Enlarged view of part D in the middle.

[0034] Description of reference numerals: 1. production line body; 11. main line body; 12. short side plate line body; 13. long side plate line body; 2. unfolding unit; 21. unfolding frame; 3. straightening unit; 31. multi-roller straightening machine; 4. bevel cutting unit; 41. pressing mechanism; 411. first hydraulic cylinder; 412. support frame; 413. rotating shaft; 42. cutter; 43. replacement assembly; 431. rotating bracket; 432. knife holder; 433. guide groove; 434. protrusion; 435. reset spring; 44. cutting table; 45. transmission member; 451. driving rod; 452. telescopic spring; 453. support rod; 454. baffle; 455. driving groove; 456. guide surface; 461. ratchet; 462. pawl; 5. notch cutting unit; 51. second hydraulic cylinder; 52. mold knife; 6. material dividing member; 61. first pressure roller; 62. screening port; 63. second pressure roller; 71. long side plate; 72. short side plate; 73. middle horizontal plate. DETAILED DESCRIPTION

[0035] The following is combined with Figure 2-8 This application is described in further detail.

[0036] On the one hand, an embodiment of the present application discloses a production line for 45° oblique shearing of silicon steel sheets.

[0037] Reference Figure 2A production line for 45° oblique shearing of silicon steel sheets includes a production line body 1. The production line body 1 in this embodiment includes a main line body 11, a short side plate line body 12 and a long side plate line body 13. The short side plate line body 12 and the long side plate line body 13 are both located downstream of the main line body 11. The long side plate line body 13 and the main line body 11 are at the same height, and the short side plate line body 12 is located below the main line body 11. The main line body 11 is used to transport the unfolded silicon steel strip by means of a conveyor belt and a rotating roller. The rotating roller presses the silicon steel strip down onto the conveyor belt to avoid separation between the silicon steel strip and the conveyor belt. The long side plate line body 13 is driven in the same way as the main line body 11, and also uses a rotating roller and a conveyor belt to drive the long side plate to move along the direction of the long side plate line body 13. The short side plate line body 12 uses a conveyor belt to transport the short side plate.

[0038] Reference Figure 2 The production line body 1 is provided with an unfolding unit 2, a correction unit 3, a bevel cutting unit 4 and a notch cutting unit 5. The unfolding unit 2 and the correction unit 3 are arranged upstream of the main line body 11. The unfolding unit 2 unfolds the silicon steel strip onto the production line body 1. The correction unit 3 levels the silicon steel strip. The bevel cutting unit 4 is arranged on the main line body 11 and cuts the silicon steel strip to form long side plates and short side plates. The notch cutting unit 5 is arranged on the long side plate line body 13 and cuts the long side plate to form a notch that matches the middle horizontal plate.

[0039] When cutting the silicon steel strip, the silicon steel strip is first unfolded by the unfolding unit 2, then corrected by the correcting unit 3, and then cut into long side boards and short side boards by the bevel cutting unit 4. The long side boards are then cut by the notch cutting unit 5 to form notches, thereby completing the 45° bevel shearing of the long side boards and the short side boards, thereby improving the matching of the long side boards and the short side boards.

[0040] Reference Figure 2 The unfolding unit 2 in this embodiment includes an unfolding frame 21, which is rotatably connected to the base layer and driven by a motor. The steel coil wound with the silicon steel strip can be detachably installed on the unfolding frame 21. The unfolding frame 21 drives the steel coil to rotate and unfolds the wound silicon steel strip from the steel coil.

[0041] Reference Figure 2 The straightening unit 3 is a multi-roller straightening machine 31, which is usually composed of multiple groups of rollers and is divided into a rough straightening section (front section) and a fine straightening section (rear section).

[0042] Rough straightening section: The front rollers apply a larger bending amount to quickly eliminate the large wave or bow bending of the steel strip. Fine straightening section: The rear rollers gradually reduce the bending amplitude, correct the micro deformation, and achieve straightening of the silicon steel strip.

[0043] Reference Figure 3 , Figure 4The bevel cutting unit 4 in this embodiment includes a pressing mechanism 41 and two groups of cutters 42. The pressing mechanism 41 includes two groups of first hydraulic cylinders 411, and each group of first hydraulic cylinders 411 corresponds to a group of cutters 42. Two groups of support frames 412 are provided on the main line body 11, and each group of cutters 42 corresponds to a group of support frames 412. A rotating shaft 413 is fixed on each group of support frames 412. The axial direction of the rotating shaft 413 forms an angle of 45° with the sliding direction of the silicon steel belt, and the axes of the two rotating shafts 413 are vertically arranged.

[0044] Reference Figure 3 , Figure 4 When the cutter 42 continuously cuts the silicon steel strip, the heat generated by the cutter 42 is not easy to dissipate in time, which will cause the hardness of the tool edge to decrease, resulting in thermal softening and thermal fatigue, and shortening the tool life. For this reason, a replacement component 43 is provided on each rotating shaft 413, which is used to replace different cutters 42 to cut the silicon steel strip.

[0045] Reference Figure 3 , Figure 4 The replacement assembly 43 in this embodiment includes a rotating bracket 431 and a knife holder 432. The rotating bracket 431 includes two identical circular plates, which are fixedly connected as a whole by a fixing rod. The rotating shaft 413 is inserted into the center of the rotating bracket 431 and is rotatably connected to the rotating shaft 413. There are multiple cutters 42 in each group, and the blade surface of the cutter 42 is parallel to the axis of the rotating shaft 413.

[0046] Reference Figure 3 , Figure 5 and Figure 6 Each cutter 42 is connected to the rotating bracket 431 through a tool holder 432. The tool holders 432 are arranged on two circular plates and are arranged opposite to each other. Each tool holder 432 is provided with a guide groove 433. The guide groove 433 is arranged along the radial direction of the rotating bracket 431. The two ends of the cutter 42 are inserted into the guide groove 433 and slide along the guide groove 433. The end of the cutter 42 extends laterally to form a protrusion 434. A return spring 435 is arranged between the protrusion 434 and the tool holder 432. One end of the return spring 435 is fixedly connected to the protrusion 434, and the other end is fixedly connected to the tool holder 432. The guide groove 433 guides the sliding of the cutter 42 to improve the accuracy and stability of the cutter 42 when it slides; when the piston rod of the first hydraulic cylinder 411 is lifted, the cutter 42 is separated from the silicon steel sheet under the push of the return spring 435, which is convenient for the subsequent rotation and replacement of the cutter 42.

[0047] Reference Figure 3 , Figure 6The cylinder body of the first hydraulic cylinder 411 is fixedly set on the rotating shaft 413, and the piston rod of the first hydraulic cylinder 411 is set vertically downward. A cutting table 44 is provided on the main line body 11, and the cutting table 44 is located below the first hydraulic cylinder 411. The conveyor belt on the main line body 11 transports the silicon steel belt to the cutting table 44. At this time, the silicon steel belt stops moving to facilitate the cutting of the silicon steel belt.

[0048] Reference Figure 3 , Figure 6 The first hydraulic cylinder 411 is connected to the rotating bracket 431 through a transmission member 45, and the transmission member 45 is used to realize the linkage between the pressing mechanism 41 and the replacement of the cutter 42, so that the cutting of the silicon steel strip and the replacement of the cutter 42 are better coordinated.

[0049] Reference Figure 3 , Figure 6 The transmission member 45 in this embodiment includes a driving rod 451 and a telescopic spring 452. A support rod 453 arranged radially along the rotating bracket 431 is fixedly provided on the piston rod of the first hydraulic cylinder 411. The driving rod 451 is inserted into the support rod 453 along the axial direction of the rotating bracket 431 and is slidably connected with the support rod 453. One end of the driving rod 451 is a spherical surface, and the end of the other end forms a baffle 454. The telescopic spring 452 is sleeved on the driving rod 451, one end of the telescopic spring 452 is fixedly connected to the baffle 454, and the other end is fixedly connected to the support rod 453. A driving groove 455 corresponding to the cutter 42 is opened on the end surface of the circular plate of the rotating bracket 431. The angle between two adjacent driving grooves 455 along the axial direction of the rotating bracket 431 is the same, and each driving groove 455 is arranged along the radial direction of the rotating bracket 431.

[0050] Initially, the telescopic spring 452 applies elastic force to the drive rod 451 toward the circular plate where the drive slot 455 is located, and the drive rod 451 abuts against the rotating bracket 431. When the drive rod 451 and the drive slot 455 are arranged opposite to each other, the telescopic spring 452 pushes the end of the drive rod 451 to insert into the drive slot 455. One side of the drive slot 455 is a straight surface, and the other side is a guide surface 456. When the first hydraulic cylinder 411 drives the drive rod 451 to rise, the drive rod 451 fits the straight surface of the drive slot 455 and drives the rotating bracket 431 to rotate counterclockwise. When the drive rod 451 is lifted to the highest point, the rotating bracket 431 drives the cutter 42 to move to just below the piston rod of the first hydraulic cylinder 411. When the first hydraulic cylinder 411 drives the drive rod 451 to move downward, the drive rod 451 slides out of the drive slot 455 along the guide surface 456. At this time, the rotating bracket 431 remains stationary.

[0051] Reference Figure 6In order to improve the stability of the unidirectional rotation of the rotating bracket 431, a ratchet 461 is coaxially fixed on the rotating shaft 413, and a pawl 462 engaged with the ratchet 461 is provided on the rotating bracket 431. When the driving rod 451 is lifted to drive the rotating bracket 431 to rotate, the pawl 462 and the ratchet 461 slide relative to each other. When the driving rod 451 moves downward, the pawl 462 is inserted into the tooth groove of the ratchet 461 to limit the rotation of the rotating bracket 431, thereby ensuring the accuracy of the position of the cutter 42 on the rotating bracket 431.

[0052] When the two cutters 42 are perpendicular to the cutting plate, a short-side plate is formed between the two cutters 42 , and a long-side plate is formed downstream of one cutter 42 .

[0053] When the piston rod of the first hydraulic cylinder 411 is lifted, the piston rod drives the driving rod 451 to be lifted. When the driving rod 451 is aligned with the driving slot 455, the driving rod 451 is inserted into the driving slot 455 under the push of the telescopic spring 452. At this time, the driving rod 451 drives the rotating bracket 431 to rotate as the piston rod is lifted. When the driving rod 451 drives the rotating bracket 431 to the limit position, another cutter 42 moves to the bottom of the piston rod of the first hydraulic cylinder 411. When the cutter 42 cuts the silicon steel strip, the piston rod of the first hydraulic cylinder 411 moves downward. At this time, the driving rod 451 slides out of the driving slot 455 under the guidance of the guide surface 456, so that the rotating bracket 431 remains stationary. The piston rod of the first hydraulic cylinder 411 presses the cutter 42 down to the silicon steel strip for cutting, thereby improving the convenience of the first hydraulic cylinder 411 rotating the rotating bracket 431.

[0054] When the piston rod of the first hydraulic cylinder 411 presses down the cutter 42, the reset spring 435 is compressed. When the cutter 42 completes cutting, the first hydraulic cylinder 411 drives the piston rod to contract, and the reset spring 435 extends, driving the cutter 42 to separate from the silicon steel sheet and reset the cutter 42. Then, the piston rod of the first hydraulic cylinder 411 drives the drive rod 451 to insert into the drive groove 455, and drives the rotating bracket 431 to rotate, so as to replace the cutter 42, so that a single cutter 42 does not need to continuously cut the silicon steel strip. During the cycle of the cutter 42, the heat generated by the cutter 42 can be dissipated, effectively avoiding thermal softening and thermal fatigue of the cutting edge of the cutter 42, thereby extending the tool life.

[0055] Reference Figure 1 , Figure 7The end of the main line body 11 is provided with a material dividing member 6. The material dividing member 6 in this embodiment includes a first pressing roller 61, which is rotatably connected to the main line body 11 and is located at the end of the main line body 11. A screening opening 62 is formed between the main line body 11 and the long side plate line body 13. Since the length of the short side plate is 1 / 2 of the long side plate, the length of the screening opening 62 is 2 / 3 of the long side plate, and the front section of the short side plate line body 12 is located below the screening opening 62. When the long side plate passes through the screening opening 62, the first pressing roller 61 presses down the long side plate to contact the main line body 11 to prevent the long side plate from warping. The long side plate line body 13 is provided with a second pressing roller 63, which is rotatably connected to the long side plate line body 13. One end of the long side plate that passes through the screening opening 62 is inserted between the second pressing roller 63 and the long side plate line body 13. When the long side plate is separated from the first pressing roller 61, the second pressing roller 63 and the long side plate are pressed down to prevent the long side plate from warping, so that the long side plate passes through the screening opening 62 and moves onto the long side plate line body 13. When the short side plate passes through the screening opening 62, the short side plate will fall onto the short side plate line body 12 below, thereby realizing the separation of the long side plate from the short side plate and improving the convenience of separation of the long side plate from the short side plate.

[0056] Reference Figure 1 , Figure 8 The notch cutting unit 5 in this embodiment includes a second hydraulic cylinder 51 and a mold knife 52. The blade of the mold knife 52 is at a right angle. The second hydraulic cylinder 51 is fixedly arranged on the long side plate line body 13, and the piston rod is facing downward. The mold knife 52 is fixedly arranged on the piston rod of the second hydraulic cylinder 51, and the blade of the mold knife 52 is facing downward. When the long side plate slides under the mold knife 52, the second hydraulic cylinder 51 drives the mold knife 52 to press down onto the long side plate, and cuts a notch on the long side plate that matches the end of the middle horizontal plate.

[0057] The implementation principle of a production line for 45° oblique shearing of silicon steel sheets in an embodiment of the present application is as follows: when cutting the silicon steel strip, the silicon steel strip in the production line is first unfolded by the unfolding unit 2, and then corrected by the correction unit 3, and then the two first hydraulic cylinders 411 respectively press the cutting knife 42 onto the silicon steel strip to cut the silicon steel strip into long side plates and short side plates. When the long side plates pass through the screening port 62, the long side plates move to the long side plate line body 13, and the short side plates fall onto the short side plate line body 12, and then the second hydraulic cylinder 51 drives the mold knife 52 to press down onto the long side plates, cutting the long side plates to form notches, thereby completing the 45° oblique shearing of the long side plates and the short side plates, thereby improving the matching of the long side plates and the short side plates.

[0058] The embodiment of the present application also provides a production process for 45° oblique shearing of silicon steel sheets.

[0059] A production process for 45° oblique shearing of silicon steel sheets comprises the following steps: S1, unwinding, installing the silicon steel tape reel on the spreading frame 21, and then rotating the spreading frame 21 to unfold the wound silicon steel tape from the silicon steel tape reel, so that it changes from a coiled state to a straight state.

[0060] S2, straightening. The unfolded silicon steel strip passes through a multi-roll straightening machine to straighten it to be flat, eliminating the bending or wavy deformation of the steel strip caused by curling.

[0061] S3, transporting, through the cooperation of the conveyor belt on the main line body 11 and the rotating roller, the unfolded silicon steel strip is transported.

[0062] S4, oblique cutting, the silicon steel strip slides onto the cutting table 44, two cutters 42 are arranged along the moving direction of the silicon steel strip at an interval of a short side plate length, the angle between the two cutters 42 is 90°, and the angle between each cutter 42 and the sliding direction of the silicon steel strip is 45°. The silicon steel strip stops each time it moves more than a long side plate length of the downstream cutter 42, and the first hydraulic cylinder 411 located downstream drives the cutter 42 to press down on the silicon steel strip to cut the silicon steel strip, and then drives the first hydraulic cylinder 411 upstream to press the cutter 42 down on the silicon steel strip to cut the silicon steel strip. After cutting, the silicon steel strip forms a long side plate and a short side plate.

[0063] When the cutter 42 cuts the silicon steel strip and the silicon steel strip breaks, lateral displacement will occur. When the downstream cutter 42 cuts the silicon steel strip, the long side plate produced can move forward to release the extrusion pressure of the cutter 42 on the long side plate. The upstream cutter 42 produces a short side plate for the silicon steel strip. At this time, the front section of the short side plate is in a free moving state. When the cutter 42 is cutting, the short side plate can release the extrusion pressure generated by the cutter 42 by moving, thereby effectively avoiding the bending phenomenon caused by the cutter 42 squeezing the short side plate, thereby improving the cutting quality of the short side plate.

[0064] S5, notch cutting, a notch matching the middle horizontal plate is cut on the long side plate formed in step S4. The second hydraulic cylinder 51 drives the mold to the long side plate pressed down on the long side plate line body 13 to cut and form a notch.

[0065] S6, unloading and collection, the cut long side boards and short side boards are transported to the collection area for stacking or boxing.

[0066] The implementation principle of a production process for 45° obliquely cut silicon steel sheets in an embodiment of the present application is as follows: when cutting the silicon steel strip, the short side plate is directly cut out by the cutter 42, and the long side plate is formed at the front section of the short side plate. The long side plate and the short side plate are cut on the same equipment, and the consistency of parameters such as tool angle, pressure, speed, etc. is higher, and the bevel accuracy is ensured to be uniform, the effects of tool wear on the two plates are synchronized, and the cutting errors can offset each other; the long side plate and the short side plate are from the same roll of steel strip, the material thickness, hardness, and internal stress distribution are consistent, and the thermal expansion and contraction effects are synchronized during splicing, so that the bevel angles of the long side plate and the short side plate are more matched.

[0067] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A production process for 45° oblique shearing of silicon steel sheets, characterized in that: The steps include: S1, unwinding, unfolding the rolled silicon steel strip and making it straight; S2, straightening, straightening the silicon steel strip to make it flat; S3, conveying, conveying the corrected silicon steel strip along the front of the assembly line; S4, bevel cutting, two cutters (42) are arranged along the moving direction of the silicon steel strip at an interval of one short side plate length, the angle between the two cutters (42) is 90°, and the angle between each cutter (42) and the sliding direction of the silicon steel strip is 45°. The silicon steel strip stops when it moves more than one long side plate length of the downstream cutter (42), and the two cutters (42) move down to cut the silicon steel strip to form a long side plate and a short side plate; S5, notch cutting, cutting a notch on the long side plate formed in step S4 to match the middle horizontal plate; S6, unloading and collection, the cut long side boards and short side boards are transported to the collection area for stacking or boxing.

2. The production process of 45° oblique sheared silicon steel sheet according to claim 1, characterized in that: In step S4, after the downstream cutter (42) finishes cutting the silicon steel strip, the upstream cutter (42) cuts the silicon steel strip again.

3. A production line for 45° oblique shearing of silicon steel sheets, using the production process for 45° oblique shearing of silicon steel sheets according to any one of claims 1-2, characterized in that: The invention comprises a production line body (1), wherein the production line body (1) is provided with an unfolding unit (2), a correction unit (3), a bevel cutting unit (4) and a notch cutting unit (5), wherein the unfolding unit (2) is capable of unfolding a silicon steel strip onto the production line body (1), the correction unit (3) is capable of leveling the silicon steel strip, the bevel cutting unit (4) is capable of cutting the silicon steel strip to form a long side plate and a short side plate, and the notch cutting unit (5) is capable of cutting the long side plate to form a notch that matches the middle horizontal plate.

4. The production line for 45° oblique shearing of silicon steel sheets according to claim 3 is characterized in that: The bevel cutting unit (4) comprises a pressing mechanism (41) and two groups of cutters (42); a cutting table (44) for placing the silicon steel strip is provided on the production line body (1); the two groups of cutters (42) are arranged above the cutting table (44); the pressing mechanism (41) can press down the two groups of cutters (42) to cut the silicon steel strip, so as to form a long side plate, a short side plate and 45° bevels on the long side plate and the short side plate.

5. The production line for 45° oblique shearing of silicon steel sheets according to claim 4 is characterized in that: The production line body (1) is provided with two groups of replacement components (43) above the cutting table (44), each group of the replacement components (43) corresponds to a group of the cutters (42), the number of the cutters (42) in each group is a plurality and they are evenly arranged on the replacement components (43), and the replacement components (43) can cyclically drive the cutters (42) to move one by one to the bottom of the pressing mechanism (41), so that the pressing mechanism (41) presses down the cutters (42) to cut the silicon steel strip.

6. The production line for 45° oblique shearing of silicon steel sheets according to claim 5 is characterized in that: The replacement assembly (43) comprises a rotating bracket (431) and a knife holder (432); the rotating bracket (431) is rotatably connected to the production line body (1) and can rotate along a vertical plane; the knife holder (432) corresponds to each group of the cutters (42) in a one-to-one manner; the cutters (42) are slidably arranged on the knife holder (432); the rotating bracket (431) can drive the cutters (42) to move below the pressing mechanism (41); the pressing mechanism (41) and the rotating bracket (431) are connected via a transmission member (45) so as to drive the rotating bracket (431) to rotate.

7. The production line for 45° oblique shearing of silicon steel sheets according to claim 6 is characterized in that: The pressing mechanism (41) comprises a first hydraulic cylinder (411), wherein the piston rod of the first hydraulic cylinder (411) faces the cutting table (44); The transmission member (45) comprises a driving rod (451) and a telescopic spring (452); the driving rod (451) is arranged on the piston rod of the first hydraulic cylinder (411), so that the first hydraulic cylinder (411) drives the driving rod (451) to move; the driving rod (451) is slidably connected to the piston rod of the first hydraulic cylinder (411); a driving groove (455) corresponding to the cutter (42) is formed on the rotating bracket (431); the telescopic spring (452) is arranged on the piston rod of the first hydraulic cylinder (411) and is slidably connected to the piston rod of the first hydraulic cylinder (411); A driving rod (451) is connected so as to be able to drive the driving rod (451) to be inserted into the driving groove (455); the driving rod (451) can slide along the driving groove (455) and drive the rotating bracket (431) to rotate so that the cutter (42) can move to the bottom of the first hydraulic cylinder (411); a removal guide surface (456) is provided on the side wall of the driving groove (455); the driving rod (451) can slide out of the driving groove (455) along the removal guide surface (456) so that the rotating bracket (431) rotates in one direction.

8. The production line for 45° oblique shearing of silicon steel sheets according to claim 6, characterized in that: The knife holder (432) is provided with a guide groove (433), and the cutter (42) is slidably arranged in the guide groove (433) so that the cutter (42) slides down to cut the silicon steel strip. The cutter (42) and the knife holder (432) are connected via a return spring (435), and the return spring (435) is used to drive the cutter (42) to separate from the silicon steel strip so that the cutter (42) can rotate along with the rotating bracket (431).

9. The production line for 45° oblique shearing of silicon steel sheets according to claim 3 is characterized in that: The production line body (1) comprises a main line body (11), a long side plate line body (13) and a short side plate line body (12); the long side plate line body (13) and the short side plate line body (12) are both located downstream of the bevel cutting unit (4); a material dividing piece (6) is provided at the end of the main line body (11); the material dividing piece (6) can distribute the long side plates to the long side plate line body (13) and the short side plates to the short side plate line body (12); and the notch cutting unit (5) is located on the long side plate line body (13).

10. The production line for 45° oblique shearing of silicon steel sheets according to claim 9, characterized in that: A screening opening (62) is formed between the main line body (11) and the long side plate line body (13), the screening opening (62) is longer than the short side plate and shorter than the long side plate, and the front section of the short side plate line body (12) is located below the screening opening (62); The material dividing member (6) comprises a first pressing roller (61) arranged on the main line body (11), the first pressing roller (61) being capable of pressing down the long side plate to contact with the main line body (11) so that the long side plate slides onto the long side plate line body (13), and a second pressing roller (63) being capable of pressing down the long side plate to contact with the long side plate line body (13) so that the long side plate is separated from the main line body (11).

Images